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MIMO communication system

  • US 20050107057A1
  • Filed: 08/05/2004
  • Published: 05/19/2005
  • Est. Priority Date: 10/10/2003
  • Status: Active Grant
First Claim
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1. A method of obtaining an estimate of a transmission channel to a receiver, the method comprising:

  • a) receiving input signals from a plurality of receive antennas, said input signals being based upon a predetermined training sequence which has been transmitted to said receiver;

    b) determining a first estimate of said transmission channel, based upon said input signals and said predetermined training sequence;

    c) carrying out co-channel interference cancellation on said input signals using said first transmission channel estimate, to provide an intermediate signal;

    d) determining a second estimate of said transmission channel based upon said intermediate signal and said predetermined training sequence;

    e) carrying out inter-symbol interference cancellation on said intermediate signal using said second transmission channel estimate, to provide an output signal; and

    f) carrying out the following steps one or more times;

    i) revising said first transmission channel estimate based upon said input signals, said predetermined training sequence and said second channel estimate;

    ii) carrying out co-channel interference cancellation on said input signals using said revised first transmission channel estimate, to provide a revised intermediate signal;

    iii) revising said second transmission channel estimate based upon said revised intermediate signal, said predetermined training sequence and said second channel estimate; and

    iv) carrying out inter-symbol interference cancellation on said revised intermediate signal using said revised second transmission channel estimate, to provide a revised output signal.

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